Synthesis, structure, and redox behavior of the dehydroannulenes fused with bicyclo[2.2.2]octene frameworks

摘要

Two series of dehydroannulenes fused with bicyclo[2.2.2]octene (BCO) units were synthesized either by an oxidative coupling with copper(I) under air or by a palladium-copper-catalyzed coupling. The first series of dehydroannulenes consisted of tetradehydro[12]annulene (15), which Dehydro[18]annulene (13), octadehydro[24]annulene (14), and decadehydro[30]annulene (15), which All have the BCO units connected by the butadiyne linkage.